Codex CLI App Production Checklist

The primary concern with Codex output is production hardening — adding the error handling, security controls, and observability that Codex skips in the interest of conciseness

Authentication protects all private routes and API endpoints. Input validation on every form and data handler. No API keys or secrets in client-side code. Security headers configured (CSP, HSTS, X-Frame-Options). CORS restricted to your domain. Rate limiting on login and signup endpoints. HTTPS enforced everywhere.

Images optimized and lazy-loaded. Code splitting implemented. Lighthouse performance score above 80. Database queries have indexes on filtered columns. Pagination on all data lists. Static assets served with cache headers. No unnecessary client-side JavaScript.

Error tracking configured (Sentry or similar). Custom error pages for 404 and 500 errors. Error boundaries catch rendering failures gracefully. Loading states on all async operations. Graceful handling of network failures. Health check endpoint for monitoring. Database backups configured.

All user inputs validated and sanitized before use. No shell injection via string interpolation in subprocess calls. File paths derived from input properly restricted. API endpoints require authentication. Credentials loaded from environment variables, not hardcoded. Database connections use pooling. All promises awaited and rejections handled. Python exceptions caught and logged with context. Logging configured at appropriate levels. Input type checking with TypeScript or Python type hints. Unit tests cover happy path and edge cases. Error responses return appropriate HTTP status codes. No sensitive data in logs or error messages. Dependency versions pinned in requirements.txt or package.json

Our security scan ($19) and code audit ($19) check for all of these issues automatically. Upload your code and get a detailed report within 24 hours. If you need help fixing what we find, our team is here for that too.